9 foods that boost metabolism naturally

Updated 1838 GMT (0138 HKT) July 7, 2014

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Boost metabolism naturally – Your metabolism is partly ruled by genetics, but you can rev it up naturally by eating right. Fill up on the following nine foods and beverages to increase your body's fat-burning power.

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Coffee – A study published in Physiology & Behavior found that the average metabolic rate of people who drank caffeinated coffee was 16% higher than that of those who drank decaf.

Lean meat – Lean meat is full of iron; deficiencies in the mineral can slow metabolism. Eat three to four daily servings of iron-rich foods, such as chicken or fortified cereal.

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Water – If you're even mildly dehydrated, your metabolism may slow down, says Dr. Scott Isaacs, clinical instructor of medicine at the Emory University School of Medicine. Tip: Drink water cold, which forces your body to use more calories to warm it up. Health.com: 15 foods that help you stay hydrated

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Chili peppers – Chili peppers contain capsaicin, a chemical compound that can kick metabolism into higher gear, Isaacs says. He suggests adding a tablespoon of chopped chili peppers to a meal once a day. Chili peppers are also an unexpected source of vitamin C.

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Green tea – The brew contains a plant compound called EGCG, which promotes fat-burning, research suggests.

Whole grains – Whole grains help your body burn more fat because they take extra effort to break down than processed grains, like white bread and pasta. Whole foods that are rich in fiber, like brown rice and oatmeal are your best bets.

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Lentils – About 20% of women are iron deficient, which is bad news for your waistline -- your body can't work as efficiently to burn calories when it's missing what it needs to work properly. One cup of lentils provides 35% of your daily iron needs.